Measurement Periods and Measurement Approaches for a Non-Terrestrial Network

Abstract

This disclosure relates to techniques for a wireless device to perform measurements of satellite reference signals in a non-terrestrial wireless communication system. According to the techniques described herein, a wireless device may establish communication with a cellular base station. The wireless device and network may exchange configuration information and/or capability information related to measurements of satellite reference signals. The wireless device and network may determine scaling factor or otherwise achieve a common understanding of the measurements.

1 . A method, comprising:
 communicating with a cellular network;   receiving, from the cellular network, configuration information comprising at least:
 a first measurement timing configuration for measurement of satellite reference signals from satellites of multiple types; and 
 a second measurement timing configuration, different from the first measurement timing configuration, for measurement of satellite reference signals; 
   determining whether first measurement opportunities according to the first measurement timing configuration overlap with second measurement opportunities according to the second measurement timing configuration in a time domain;   determining a first number of satellites associated with the first measurement timing configuration;   determining a first scaling factor based at least on:
 whether the first measurement opportunities overlap with the second measurement opportunities in the time domain; and 
 the first number of satellites; and 
   performing first measurements of satellite reference signals according to the first measurement timing configuration, wherein a time period for the first measurements is determined based on the first scaling factor.   
     
     
         2 . The method of  claim 1 , further comprising:
 transmitting, to the cellular network, capability information comprising an indication of a number of satellites measurable during a first duration of time, wherein the first scaling factor is further determined based at least on the number of satellites measurable during the first duration of time.   
     
     
         3 . The method of  claim 2 , wherein:
 the number of satellites measurable during the first duration of time is specific to a first type of satellites; and   the first number of satellites is specific to the first type of satellites.   
     
     
         4 . The method of  claim 2 , wherein:
 the number of satellites measurable during the first duration of time is for multiple types of satellites; and   the first number of satellites is for the multiple types of satellites.   
     
     
         5 . The method of  claim 2 , wherein:
 the first measurement opportunities do not overlap with the second measurement opportunities in the time domain;   the number of satellites measurable during the first duration of time is for multiple types of satellites; and   the first number of satellites is specific to a first type of satellites.   
     
     
         6 . The method of  claim 1 , further comprising:
 determining a number of measurement timing configurations that is/are for measurement of only a first type of satellites, wherein the first scaling factor is further determined based at least on the number of measurement timing configurations that is/are for measurement of only the first type of satellites.   
     
     
         7 . The method of  claim 6 , wherein the first scaling factor is further determined using an equation in which the number of measurement timing configurations that is/are for measurement of only the first type of satellites is added to:
 a first summation over any measurement timing configurations that are for measurement of only a second type of satellites; and   a second summation over any measurement timing configurations that are for measurement of both the second type of satellites and the first type of satellites.   
     
     
         8 . The method of  claim 1 , wherein:
 the first measurement opportunities do not overlap with the second measurement opportunities in the time domain;   performing first measurements of satellite reference signals according to the first measurement timing configuration comprises performing measurements of satellites of a first type of satellites in parallel;   the first number of satellites is specific to a second type of satellites different from the first type of satellites; and   the first scaling factor is further determined using an equation in which a ‘1’ is added to the first number of satellites inside of a ceiling function.   
     
     
         9 . The method of  claim 1 , wherein:
 the first measurement opportunities do not overlap with the second measurement opportunities in the time domain;   performing first measurements of satellite reference signals according to the first measurement timing configuration comprises performing measurements of satellites of a first type of satellites in parallel;   the first number of satellites is specific to a second type of satellites different from the first type of satellites; and   the first scaling factor is further determined using an equation in which a ‘1’ is added to a ceiling function of the first number of satellites.   
     
     
         10 . The method of  claim 1 , wherein:
 the first measurement opportunities do overlap with the second measurement opportunities in the time domain; and   the first scaling factor is further determined using an equation in which a ceiling function of a number of satellites associated with a respective measurement timing configuration in summed over multiple measurement timing configurations, including at least the first measurement timing configuration and the second measurement timing configuration.   
     
     
         11 . The method of  claim 1 , further comprising:
 performing second measurements of satellite reference signals according to the second measurement timing configuration, wherein a time period for the second measurements is determined based on the first scaling factor.   
     
     
         12 . The method of  claim 1 , further comprising:
 performing second measurements of satellite reference signals according to the second measurement timing configuration, wherein a time period for the second measurements is determined based on a second scaling factor different from the first scaling factor.   
     
     
         13 . An apparatus, comprising:
 a processor configured to, when executing instructions stored in a memory, perform operations comprising:   communicating with a cellular network;   receiving, from the cellular network, configuration information comprising at least:
 a first measurement timing configuration for measurement of satellite reference signals from satellites of multiple types; and 
 a second measurement timing configuration, different from the first measurement timing configuration, for measurement of satellite reference signals; 
   determining whether first measurement opportunities according to the first measurement timing configuration overlap with second measurement opportunities according to the second measurement timing configuration in a time domain;   determining a first number of satellites associated with the first measurement timing configuration;   determining a first scaling factor based at least on:
 whether the first measurement opportunities overlap with the second measurement opportunities in the time domain; and 
 the first number of satellites; and 
   performing first measurements of satellite reference signals according to the first measurement timing configuration, wherein a time period for the first measurements is determined based on the first scaling factor.   
     
     
         14 . The apparatus of  claim 13 , the operations further comprising:
 transmitting, to the cellular network, capability information comprising an indication of a number of satellites measurable during a first duration of time, wherein the first scaling factor is further determined based at least on the number of satellites measurable during the first duration of time.   
     
     
         15 . The apparatus of  claim 13 , the operations further comprising:
 determining a number of measurement timing configurations that is/are for measurement of only a first type of satellites, wherein the first scaling factor is further determined based at least on the number of measurement timing configurations that is/are for measurement of only the first type of satellites.   
     
     
         16 . The apparatus of  claim 13 , wherein:
 the first measurement opportunities do not overlap with the second measurement opportunities in the time domain;   performing first measurements of satellite reference signals according to the first measurement timing configuration comprises performing measurements of satellites of a first type of satellites in parallel;   the first number of satellites is specific to a second type of satellites different from the first type of satellites; and   the first scaling factor is further determined using an equation in which a ‘1’ is added to the first number of satellites inside of a ceiling function.   
     
     
         17 . A method, comprising:
 communicating with a user equipment device (UE);   transmitting, to the UE, configuration information comprising at least:
 a first measurement timing configuration for measurement of satellite reference signals from satellites of multiple types; and 
 a second measurement timing configuration, different from the first measurement timing configuration, for measurement of satellite reference signals; 
   determining whether first measurement opportunities according to the first measurement timing configuration overlap with second measurement opportunities according to the second measurement timing configuration in a time domain;   determining a first number of satellites associated with the first measurement timing configuration;   determining a first scaling factor based at least on:
 whether the first measurement opportunities overlap with the second measurement opportunities in the time domain; and 
 the first number of satellites; and 
   receiving, from the UE, a report of first measurements of satellite reference signals according to the first measurement timing configuration, wherein a time period for the first measurements is determined based on the first scaling factor.   
     
     
         18 . The method of  claim 17 , further comprising:
 receiving, from the UE, capability information comprising an indication of a number of satellites measurable during a first duration of time, wherein the first scaling factor is further determined based at least on the number of satellites measurable during the first duration of time.   
     
     
         19 . The method of  claim 17 , further comprising:
 determining a number of measurement timing configurations that is/are for measurement of only a first type of satellites, wherein the first scaling factor is further determined based at least on the number of measurement timing configurations that is/are for measurement of only the first type of satellites.   
     
     
         20 . The method of  claim 17 , wherein:
 the first measurement opportunities do overlap with the second measurement opportunities in the time domain; and   the first scaling factor is further determined using an equation in which a ceiling function of a number of satellites associated with a respective measurement timing configuration in summed over multiple measurement timing configurations, including at least the first measurement timing configuration and the second measurement timing configuration.